Green Marine (UK) has gained Approval in Principle from RINA for Project Verdant, a groundbreaking initiative to retrofit Crew Transfer Vessels (CTVs) with hydrogen, fuel cells, and batteries. The project's first phase, which involved a preliminary design and feasibility study, has been completed successfully. Led by Green Marine (UK) and supported by Waves Group and the European Marine Energy Centre (EMEC), Project Verdant's design incorporates hydrogen fuel cells connected to electric motors, working alongside diesel engines to enable zero-emission operation at slow speeds. The collaboration with Energys and Engineered Marine Systems (EMS) has been crucial in designing and providing engineering for the project. Findings suggest that the hybrid system could lead to a 30% reduction in CO2 emissions and a 40% decrease in NOx emissions, addressing the environmental impact of CTVs operating in loiter mode for extended periods. The long-term goal of Project Verdant is to use the insights gained from the retrofitted vessel to expand Green Marine (UK)'s fleet with new zero-emission CTVs and Service Operation Vessels (SOVs). The project aims to de-risk the implementation and testing of hydrogen fuel-cell vessels, potentially paving the way for wider adoption in the maritime sector. The innovative approach of retrofitting CTVs with hydrogen systems not only aims to reduce emissions but also to enhance vessel redundancy and flexibility. This project represents a significant step towards advancing maritime decarbonization, showcasing a new standard for environmental responsibility in offshore services. The positive sentiment expressed by key stakeholders, like Jason Schofield and Jeremy Panes, underscores the potential impact of Project Verdant in revolutionizing offshore wind farm servicing with hydrogen technology.